Take a deep breath and try to slow yourself down, prioritise and try to work methodically. Blindingly obvious to everyone except the person who's in the s**t. (usually me.) See if you can get some back seat rides, watch all the time and think, what would I be doing here? I found that almost as useful as doing the flying, and best of all it's free. You can't beat time in the air, no matter what.
Good luck, it does get easier quickly as soon as you stop getting worried by it. We've all been there.(Usually once a year at renewal time!!)